In the context of species-area relationship, Z value is most likely to be highest for the bird species in

Z value is high for areas with high species richness (usually near equator). Colombia located near the equator has nearly 1,400 species of birds while New York at 41° N has 105 species and Greenland at 71° N only 56 species. Although pacific islands are rich in bird species, many (almost 2000) bird species are extinct there due to human colonisation.